Turning-lathe



(No Model.) sheets-smeet 1.

H. C. BALSBAUG-H. y

l l V'TURNING"LATELLL No. 25'8,000. Patented May 1694882.V

(NoModL) 2 Sheqts-Sheet 2.

11o'. BALSBAUGHV..

TURNING LATHE. v

No. 258,000. Patented May 16, 1882.

f5, fr 4 Y l v Attorneys UNITED STATES PATENT OEEIGE.

HENRY C. 'BALSBAUGH, OF HUDSON, VISCONSIN.

TURNING-LATH E.

SPECIFICATION forming part of LettersPatent No. 258,000, dated May 16, 1882.

Application filed December 2S, 1881. (No model.)

and useful Improvements in Turning-Lathes; l and I do hereby declare that the following is" afull, clear, and exact description of the inven tion, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part ot' this specication. y i

Figure 1 is a side view. Fig. 2 is a view of the opposite side. Fig. 3 is a'vertical sectional view. Fig. 4 is a vertical cross-section- Fig. 5 is a sectional view ot' one of the jaws on the line x m, Fig. l. Fig. 6 is a section on theline y y, Fig. l. Fig. 7 is a detail view,`sl1owing in perspective the construction of the revolving collar; and Fig. S is a section of one of the jaws on the line y y, Fig. 4.

sents a framehaving a bearing for a revolving collar, B, provided on either side with bearings "for the clamping-jaws U, one side of said collar being provided with three and the other side with four such bearings, which consist ot' radial grooves arranged at equal distances apart. The clamping-jaws, the construction of which will be hereinafter described, are detachable,

and may be adjusted upon either side of the` are secured by nuts L.' By turning thescrews F the clamping-jaws may be radially adjusted to clamp the object introduced throughthe collar. seats M for the vibrating or rocking end pieces, N, which, wh'en the object to be clamped is tapering, will adapt themselves thereto and hold it tirmly. Said end pieces may,when desired, be easily removed by removing the pins by which they are held in place.

The revolving collar B is constructed in two separate pieces or sections, O O, connected by The inner ends ofthe frames D have,

tapering or wedge-shaped in direction of its length, so as. to enable the sections to be held securely together by means of a single tapering pin, Q, driven through suitableperforations inthe rib and ltnges forming the joint, and made to register, as shown. The construction of thecollarhas been clearly shown in Fig. 7 of the drawings.

The frame A consistsof a lower part or base, B, adjristable upon the lathe, as will be presently described, and an upper section, S. The said parts, when fitted together, form a. circular ring or bearing for the revolving collar B, which is provided with a 'circumferential rib, T, fitting in a groove, U, in the box or bearing and holding it in position.

The parts R and S, constituting the frame,

are provided with laterally-projecting lugs V V and W W, having vertical slots X. Y are bolts hinged inthe slots of lugs V V and provided with nuts Z. By swinging the bolts into the slots of lugs W W ot' the top S and tightening the nuts the parts B and S may be clamped securely together. The said parts are kept a slight distance apart by plates or washers A', interposed between them. When on account of wear the revolving collar becomes loose in its bearing, this may be compensated for by removing the washers A and inserting thinner ones, or planing a small portion oit' their faces. The partsB and S are hinged together at one end by means ot short bolts or set-screws B', passing through sleeves O', fitted in the sides of one of the slotted lugs WV, as clearly shown in Fig. 6 ot'gthe drawings, and into threaded perforations D in the sides of the corresponding lug. slightly on one side, so as to be clamped be- I OD The sleeves G project y tween lug V and the head of the screw or bolt when the latter is tightened. By this arrangement it will be seen that the upper part, S, turns not upon bolts B', but upon sleeves C', 5 as a hinge. When, in order to compensate for Wear of the revolving collar, it becomes necessary to reduce the thickness of the plates or washers A', the bolts B' should be slightly loosened, so as to enable the top S to drop :o down squarely upon base R. rIlhe bolts B' areA then again tightened, and the topis then ready to be worked upon its hinge as before.

The base It is provided with a foot-piece, D", having upon its under side a groove, E', 15 in direction ot' its length, to receive ribs F' upon the upper sides of two clamps, G', adjustable by means ot' bolts H'. By properly adjusting said clamps the collar B may be easily centered horizontally, the clamps being 2o originally made of such height that by planing` a sufficient quantity oit their un'der sides the device may be centered in-a vertical plane. The revolvingcollar B is provided in its edgewith a recess, I', adapted to receive the 25 point cfa setscrew, J', working in the top S ofthe frame, when for any reason it becomes necessary to prevent the collar from revolving, thus forming a stationary as Well as a revolving rest. 3ov The operation and advantages of my invention will be readily understood from the foregoing description, taken in connection with thedrawings hereto annexed, by those skilled in the art to which it appertains. It is simple,

35 convenient, and easily adjusted for operation. When the objects to be turned are so large at the ends as to prevent the collarB from being slipped on, the collar may be taken apart and adjusted at the proper place.

Having thus described my invention, I claim 4o and desire to secu-re by Letters Patent ofthe United Statesl. rIhe combination, with the frame or bear ing A, ot' the reversible revolving collar B, provided on each side with grooves for the de- 4 5 tachable clamping-jaws O, substantially as and for the purpose set forth.

2. 'lhe herein-described revolving collar, consisting of two parts connected by a dovetail joint, tapering or wedgeshaped in direction of 5o its length, and by a single tapering pin, substantially as set forth.

3. The frame consisting ofthe base R and hinged top S, with the interposed plates or Washers A', in combination with the revolving 5 5 reversiblecollar B, substantially as set forth.

4. The slotted lug W, having sleeves C' litted lin its sides and projecting at the ends, in combination with the headed bolts or setscrews B', passing loosely through said sleeves 60 HENRY C. BALSBAUGH.

Witnesses:

A. J. McCLnLLAN, WM. S. EvNs. 

